In 2018, 63 is the most common age for an American (U.S.) Arthur who is registered male with the Social Security Administration. It is the 177th most common male first name for living U.S. citizens.
― Anonymous User 10/5/2018
3
It's also used in the Netherlands where it's pronounced AHR-tuyr. [noted -ed]
https://www.behindthename.com/name/arthur/top/brazil?compare=artur
https://www.behindthename.com/name/arthur/top/portugal?compare=artur